Specifications

October 2012 © British Telecommunications plc 2011
Page 17
Some menu items have more options. i.e. F8 has 4 options to set the comms fault output type.
On such menus, the Set (S) button enters the sub menu, the set (S) button increments through
the 4 options with each press, then the mode (M) button returns to the main menu.
Some more complex menu items use the mode button to also step through additional levels in
the sub menu. i.e. P1 sets the polarity of pins 1 to 8. The set button enters the P1 submenu.
The S button toggles the polarity of pin 1, the M button increments to pin 2, where the S button
can be used again to toggle the state. Each press of M will increment the pin, up to the last pin
8 and then return to the main menu.
A similar process is used on the menu items that allow IP addresses to be input. Set button (S)
enters the sub menu. Set button (S) then increments the first digit with each press. Mode
button (M) increments to the next digit, where button S can again be used to set this value.
The M button will increment through all digits 1-12 in the IP address.
Some special characters are used on the displays. These are detailed in fig. 14.
At any time the configuration mode can be exited, without saving changes, by holding down M
for 5 seconds.